once you have a foot in the door, it's not too hard to expand your range of activities into door entry controls, alarm systems, CCTV or solar panels (though that does cost a bit) Nothing worse IMHO than standing still doing the same old basic electrics day in, day out. Electrics are involved in just about everything these days, so plenty of opportunities to progress.
make a few good contacts and take on the small jobs their not interested in. Shame you are in Bradford, I've been wanting to add a female sparky to the business for a while - good for domestic works as not all women appreciate hairy arsed blokes in their houses :^O . ( not that I'm saying you couldn't do comercial or industrial) We tend to turn away a lot of things like odd light changes and stuff like that becuase they interfere too much with the work that makes real money, but the joy of these jobs for a beginner is that they are mostly quite simple, you can learn a lot from them, and because they tend to be half a day, couple of hours, can be fitted in around child care. It's how I started out having retrained at 39.